---
res:
bibo_abstract:
- AbstractIn order to reduce fuel consumption and
thus pollutant emissions, the automotive industry is increasingly developing lightweight
construction concepts that are accompanied by an increasing usage of aluminum
materials. Due to poor weldability of aluminum in combination with other materials,
mechanical joining methods such as clinching were developed and established in
series production. In order to predict the relevant characteristics of clinched
joints and to ensure the reliability of the process, it is simulated numerically
during product development processes. In this regard, the predictive accuracy
of the simulated process highly depends on the implemented friction model. In
particular, the frictional behavior between the sheet metals as well as between
the sheet metal and clinching tools has a significant impact on the geometrical
formation of the clinched joint. No testing methods exist that can sufficiently
investigate the frictional behavior in sheet materials, especially under high
interface pressures, different relative velocities, and long friction paths, while
allowing a decoupled consideration of the test parameters. This paper describes
the development of further testing concepts based on a proven tribo-torsion test
method for determining friction coefficients between sheet metal materials for
the simulation of clinching processes. For this purpose, the correlation of interface
pressure and the relative velocity between aluminum and steel sheet material in
clinching processes is investigated using numerical simulation. Based on these
findings, the developed concepts focus on determining friction coefficients at
interface pressures of the above materials, yield stress, as well as the reproduction
of the occurring friction conditions between sheet metal materials and tool surfaces
in clinching processes using tool substitutes. Furthermore, wear investigations
between sheet metal material and tool surface were carried out in the friction
tests with subsequent EDX analyses of the frictioned tool surfaces. The developed
method also allows an optical deformation measurement of the sheet metal material
specimen by means of digital image correlation (DIC). Based on a methodological
approach, the test setups and the test systems used are explained, and the functionality
of the concepts is proven by experimental tests using different sheet metal materials.@eng
bibo_authorlist:
- foaf_Person:
foaf_givenName: Max
foaf_name: Böhnke, Max
foaf_surname: Böhnke
foaf_workInfoHomepage: http://www.librecat.org/personId=45779
- foaf_Person:
foaf_givenName: Moritz Sebastian
foaf_name: Rossel, Moritz Sebastian
foaf_surname: Rossel
foaf_workInfoHomepage: http://www.librecat.org/personId=44503
- foaf_Person:
foaf_givenName: Christian Roman
foaf_name: Bielak, Christian Roman
foaf_surname: Bielak
foaf_workInfoHomepage: http://www.librecat.org/personId=34782
- foaf_Person:
foaf_givenName: Mathias
foaf_name: Bobbert, Mathias
foaf_surname: Bobbert
foaf_workInfoHomepage: http://www.librecat.org/personId=7850
- foaf_Person:
foaf_givenName: Gerson
foaf_name: Meschut, Gerson
foaf_surname: Meschut
foaf_workInfoHomepage: http://www.librecat.org/personId=32056
orcid: 0000-0002-2763-1246
bibo_doi: 10.1007/s00170-021-07986-4
dct_date: 2021^xs_gYear
dct_isPartOf:
- http://id.crossref.org/issn/0268-3768
- http://id.crossref.org/issn/1433-3015
dct_language: eng
dct_title: Concept development of a method for identifying friction coefficients
for the numerical simulation of clinching processes@
...